如果您想验证 HTTP URL,请忘记正则表达式并使用内置验证器。
如果您只想要没有任何协议的域,请尝试:
def full_domain_validator(hostname):
"""
Fully validates a domain name as compilant with the standard rules:
- Composed of series of labels concatenated with dots, as are all domain names.
- Each label must be between 1 and 63 characters long.
- The entire hostname (including the delimiting dots) has a maximum of 255 characters.
- Only characters 'a' through 'z' (in a case-insensitive manner), the digits '0' through '9'.
- Labels can't start or end with a hyphen.
"""
HOSTNAME_LABEL_PATTERN = re.compile("(?!-)[A-Z\d-]+(?<!-)$", re.IGNORECASE)
if not hostname:
return
if len(hostname) > 255:
raise ValidationError(_("The domain name cannot be composed of more than 255 characters."))
if hostname[-1:] == ".":
hostname = hostname[:-1] # strip exactly one dot from the right, if present
for label in hostname.split("."):
if len(label) > 63:
raise ValidationError(
_("The label '%(label)s' is too long (maximum is 63 characters).") % {'label': label})
if not HOSTNAME_LABEL_PATTERN.match(label):
raise ValidationError(_("Unallowed characters in label '%(label)s'.") % {'label': label})
用法:
from django.core.validators import URLValidator
field = models.CharField(_('host name'), max_length=255, validators=[URLValidator])
或者
field = models.CharField(_('host name'), max_length=255, validators=[full_domain_validator])